FMI opines the sustainable claims substantiation market was valued at USD 1.14 billion in 2025. Sales are expected to reach 1.30 USD billion in 2026 and 4.68 USD billion by 2036. Third-party Verification is poised to lead by Service Type with 42.0% share in 2026 and FMCG & Packaging is estimated to command by End-use Industry in 2026.